Brakes – Vehicle – Velocipede
Patent
1999-08-12
2000-07-18
Oberleitner, Robert J.
Brakes
Vehicle
Velocipede
188 2412, 188 2422, B62L 300
Patent
active
060893567
ABSTRACT:
A bicycle brake device has a pair of brake mechanisms for applying a braking action to a rim of a bicycle wheel. Each brake mechanism includes a mounting member which is fixedly coupled to the frame of the bicycle. Each brake mechanism further includes a brake arm, a linkage assembly, a brake shoe and a biasing member or return spring. In the preferred embodiments of the present invention, the linkage assembly is a four-bar linkage assembly in which a biasing member applies a stabilizing force to the links to reduce vibrational movement therein. In one embodiment, the biasing member is a torsion spring fixed about the pivot pin between the brake shoe attachment link and the brake arm. In a second embodiment, the biasing member is a torsion spring positioned between the inner link and the brake shoe attachment link. In a third embodiment, the return spring acts as both the spring for biasing the brake arm from the braking position to a release position as well as a biasing member for applying a stabilizing force on the linkage assembly to reduce vibrational movement of the linkage assembly.
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patent: 5960913 (1999-10-01), Kuo
Kariyama Osamu
Ohta Katsuyuki
Oberleitner Robert J.
Shimano Inc.
Williams Thomas J.
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